Characterization of Broadband Regional Distance Seismograms: Use of Global, Open Data to Study Regions of Interest.
Abstract
This research undertook scientific problem inherent in the monitoring of a comprehensive nuclear test ban treaty; establishing confidence that the seismograms from small and moderate-sized events are understood, thus, identifiable. This requires an understanding of broadband regional distance seismic phases from both explosions and earthquakes, the excitation of the various phases, and their dependence on source. Data from open broadband stations across the Andean Cordillera were used in research to evaluate the utility of the spectral characteristics of regional distance seismo-grams of phase ratio pairs (Pg/Lg; Pn/Lg). The entire regional waveforms for seismic events traversing the Andes were modeled providing detail of crustal thickness, the average crustal velocity, and propagation efficiency. Further, this report details research to treat a single regional distance station as a seismic observatory and to establish a relative location procedure in which to locate smaller magnitude events relative to an established epicentral coordinate. Finally, the results are reported of a temporary broadband deployment used to record the DOE hosted Non-Proliferation Experiment; exploration of how geologic environment changes affects discriminants. (MM)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1995
- Accession Number
- ADA297909
Entities
People
- Susan L. Beck
- Terry C. Wallace
Organizations
- University of Arizona